MA44x
‐
en
‐
GB_V1.0 8/16
18
Specifications
Electrical Specifications
Accuracy is given as ± (% of r least significant digits) at 23
C ±5
C with relative humidity
≤
75%.
Accuracy is specified for a period of one year after calibration.
1.
Temperature Coefficient is 0.1 x specified accuracy /
C, < 18
C (64.5
F), > 28
C (82.4
F)
2.
MA443/MA445 AC Functionality: ACV and ACA specifications are AC coupled, True RMS; For non
‐
sinusoidal waveforms, additional accuracy Crest Factor (C.F.) considerations exist as detailed below:
Function
Range
Resolution
Accuracy (reading)
‘OL’ Protection
AC Current
4.000 A*
0.001 A
± (2.5% + 30 digits)
400A
40.00 A
0.01 A
± (1.8% + 9d) MA440
± (2.5% + 5d)
MA443/MA445
400.0 A
0.1 A
*4A
range
on
MA440
only
True
RMS
current
(MA443
and
MA445
only)
applicable
to
10%~100%
of
range
Frequency
response:
50~60Hz
(MA440
and
MA443)
and
40~400Hz
(MA445)
MA443/MA445
AC
Crest
factor
considerations:
a)
Add
4%
(MA443)
3%
(MA445)
when
wave
factor
is
1
~
2
b)
Add
6%
(MA443)
5%
(MA445)
when
wave
factor
is
2
~
2.5
c)
Add
8%
(MA443)
7%
(MA445)
when
wave
factor
is
2.5
~
3
DC Current
(MA445)
40.00 A
0.01 A
± (2.0% + 3 digits)
400A
400.0 A
0.1 A
Use
the
ZERO
function
to
null
display
(residual
magnetism)
before
taking
a
measurement.
AC Voltage
4.000V 0.001V
± (1.2% + 5 digits)
600V AC/DC
40.00V 0.01V
400.0V 0.1V
600V
1V
± (1.5% + 5 digits)
True
RMS
voltage
(MA443
and
MA445)
applicable
to
10%~100%
of
the
range
Input
Impedance:
≥
10M
Ω
;
Frequency
Response:
50~60Hz
(MA440
and
MA443)
and
40~400Hz
(MA445)
MA443/MA445
AC
Crest
factor
considerations:
a)
Add
3%
when
wave
factor
is
1
~
2
b)
Add
5%
when
wave
factor
is
2
~
2.5
c)
Add
7%
when
wave
factor
is
2.5
~
3
DC Voltage
400.0mV
0.1mV
± (1.0% + 5 digits)
600V AC/DC
4.000V
0.001V
± (0.8% + 1 digit)
40.00V 0.01V
± (0.8% + 3 digits)
400.0V 0.1V
600V
1V
± (1.0% + 3 digits)
Input
Impedance:
≥
10M
Ω
